Digital Input - Graco PCF Instructions And Parts

Digital Input

The digital inputs function only when power is supplied to pin 51 and there is a ground connection to pin 70. See Pin
References, page 96, for details. The digital input is rated at 0-30 Vdc, and requires an NEC Class 2 power supply
connected to pin 51. The DGM provides optical isolation as shown in the following illustration.
• Pins: 52 – 59, 71-78
• Type: Sinking
Microcontroller Microcontroller
313377B
Discrete Gateway Discrete Gateway
Isolated Logic ICs Isolated Logic ICs
Optical Optical
Isolator Isolator
Appendix B - DGM Connection Details
• Maximum current draw: 3.6 mA
Customer Automation Customer Automation
D-Sub Pin 51 (Isolated D-Sub Pin 51 (Isolated
Logic Supply) Logic Supply)
Digital Input Digital Input
D-Sub Pin 70 D-Sub Pin 70
(Isolated Ground) (Isolated Ground)
24VDC 24VDC
97